Grappling for glory

A sumo wrestler hoists his opponent in the air during the "Honozumo" ceremonial sumo tournament at the Yasukuni Shrine in Tokyo.

Sumo's history stretches back about 1,500 years with roots in a religious ritual conducted in Shinto shrines along with prayers for abundant harvests. Victory is achieved when one wrestler either pushes his opponent out of the ring (dohyo) or topples him.

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3 Apr 2015. TOKYO, JAPAN. REUTERS/Thomas Peter

Followers of Japan's national sport watch as sumo wrestlers vie for victory.

3 Apr 2015. TOKYO, JAPAN. REUTERS/Thomas Peter

A police officer keeps fans back as they watch the arrival of sumo competitors.

3 Apr 2015. TOKYO, JAPAN. REUTERS/Thomas Peter

A sumo wrestler greets supporters gathered to see the tournament’s competitors.

3 Apr 2015. TOKYO, JAPAN. REUTERS/Thomas Peter

Sumo wrestlers take part in a Shinto ritual before the start of the contest.